Window-fastener



F. T. SCHNEIDER. WINDOW FASTENER.

APPLICATION FILED MAR. a. 1920.

1,399,277. Patented Dec. 6-, 1921. Q

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PATENT OFFlQE.

FREDERICK THOMAS SCHNEIDER, OF NEX YGR-K, N. Y.

WINDON-FASTENER.

Specification of Letters Patent.

Application filed March 3, 1920. Serial No. 363,052.

in (1Z3 whom it may concern Be it known that I, FREDERICK THOMAS SCHNEIDER, a citizen of the United States, and resident of the borough and county of the Bronx, city and State of New York, have invented certain new and useful Improvements in lVindow-Fasteners, or which the following is a specification.

This invention relates to new and useful provements in window latches and has for its principal object to provide a safe and secure lock which cannot be opened from the exterior.

Another object of the invention is to provide a window lock wherein the locking bar is hardened to such a degree to frustrate any attempt at filing or sawing the bar which would weaken the same to such an extent as to permit the breaking of the bar and thereby opening sashes.

A further object of the invention resides in the provision of a keeper for retaining the bar in locked position and which closely fits around the locking bar, thereby securing the same against movement when the device is locked.

As further and more specific object the invention consists in a provision of yieldable means for retaining the bar in either opened or closed position. such means being independent of locking means or keeper.

.Vith these and other objects in view, the invention consists in novel construction, combination and arrangement of parts which will be fully set forth in the following specification claimed and illustrated in the accompanying drawings in which Figure 1. is a top plan view of the window fastener constructed in accordance with this invention showing the same in latched position.

Fig. 2, is a side view of Fig. 1.

Fig. 3, is an end view of Fig. 1.

Fig. 4, is a longitudinal section taken on line of Fig. 1.

Fig. 5, is an end view of the fastening bar and supporting mechanism therefor, and

Fig. 6 is a longitudinal section taken on line 66 of Fig. 1.

Referring to the drawings in detail the numeral 10 designates in its entirety, the supporting means for the fastening bar which comprises a base plate 11 formed adjacent one longitudinal edge with an upstanding flange 12. This flange is provided at its inner end with an extension 13 which is formed with a laterally extending arm 1 1 having a centrally arranged opening 1.5 which alines with a threaded recess 16 formed in the plate 11. The plate 11 is provided in its upper face with a longitudinal. groove 1'? and a transverse groove 18. the intersection of which grooves is directly in al .ienient with the opening and the recess 16. Pivoted on a pivot screw. 19 which extends through the opening and into the recess there 18 a latching bar 20 which is notched as at 21 to provide a fiat ace against,

which the lower e. l of a compression coil spring 22 bears. The upper end of. said spring ears against the under side of the locking bar by the numeral 23 which comprises a base u plate 24t'formed adjacent opposite longitudinal edges with upwardly extending flanges 25 the inner ends of which are extended as at 26 to provide retaining fingers for the latching bar when the same is in latched position. Pivoted as at 27 between the flanges 25, is a keeper hook 28 provided at its rear end with an ear 29, forming a thumb piece by means of which the hook may be released. The opposite end of said hook when in closed position extends into a recess 30 formed in the plate 24 and arranged against the rear end of the keeper hook is a leaf spring 31 which normally tends to force the hook into a closed position.

The recess 32 is formed in the plate 24 between the ears and is designed to accommodate the bowed end of the spring 31 when the same is depressed. Formed in the upper side of the plate and alining with the transverse groove 18, in the plate 11 is a transversely extending groove 33 in which the latching bar rests when the device is in a latched position.

In operation it will be seen that the latching bar when in opened position rests inthe groove 17 and is held against accidental swinging movement by the retaining spring 29.. When it is desired to latch the device, pull is exerted upon the bar and a simultaneous pressure is applied to the thumb piece 29, thereby swinging the keeper hook 28 into the dotted line or open position shown in Fig. 2, at which time the latching bar 20 may be swung beneath the retaining fingers 26 and into the grooves 18 and 33, the keeper hook is then released and it will be obvious that the spring 31 will force the end of said hook into the recess 30 and hold the bar against further swinging movement thereby securing the plates 11 and 24 and latching the sashes in closed position. It will be obvious that the bar cannot be swung into open position without first releasing the keeper hook 28 and with said bar being formed of a hardened material, any attempt to file or saw through said bar is thereby frustrated. 7

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that certain minor changes in the details or construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the inven tion as claimed.

What is claimed is A window fastening comprising a plate having formed therein longitudinal transverse grooves, said plate being adapted-to be secured to the upper sash of a window, a vertically pivoted latch bar carried by the plate and adapted to be yieldably held in either of said grooves, a keeper plate adapted to be secured to the lower sash 01" a window and having a transverse groove adapted to register with. the transverse groove in the first mentioned plate, when the window is closed, spaced flanges adjacent opposite edges of said keeper plate, retaining fingers on said flangesadapted to partially extend over the FREDERICK THOMAS SQHNEIDER. 

